Core moving fitness chair

ABSTRACT

The present invention relates to a core-moving health chair comprising: an outer frame where the structure of the chair is divided into a circumferential zone and a central zone; a central inner frame where the floor frame of the chair is divided into a circumferential zone and a central zone; a core-moving means which is attached to the floor frame of the chair and which moves the central inner frame upwards or downwards; and a core-driving means which drives the core-moving means and moves the core upwards or downwards. The present invention provides a core-moving health chair which can change the pressure at the portion being compressed under body weight when the chair is being sat upon. The core of the chair is assembled on the core-moving means, the position of the core of the chair is moved by means of the core-moving means, and the core-moving movement is driven by means of a motor. If the core-moving means is provided in the seating location of the chair, then a person sitting on the chair can experience a change in the pressure distribution on the buttocks. This feature allows the contact pressure of the chair to be adjusted to suit the requirements of the individual. Alternatively, air circulation in the buttock region can be adjusted. By changing the region where pressure is applied to the buttocks, the present invention can be used to promote health for example with sphincter-muscle exercise and Kegel exercise while seated on the chair.

TECHNICAL FIELD

The present invention relates to a core-moving health chair, and more particularly to a core-moving health chair in which a portion of an area, upon which a user's weight rests, is set as a moving core region, and the moving core region is mechanically moved, so as to allow a part of a user's body to become free from compression under the user's weight or to be in a low pressure state. Further, the area of the core-moving health chair, upon which the user's weight rests, includes at least one area of a seat, a back, and a foothold of the chair.

BACKGROUND ART

In general, chairs are the oldest form of furniture formed by attaching legs to a seat on which a person sits. There are various chairs, such as a simple chair with only a seat, a chair with a back, an armchair, and a chair with a foothold. In modern times, people tends to spend a longer time sitting on chairs at home, in an office, a rest room, a restaurant, or a vehicle than they spend standing or walking. A person sitting on a chair gets enough rest with leaning against the chair, but as an office worker continues to spend a long time each day in a sitting posture, a blood circulation disorder is generated from a part of a body where the weight of the worker is concentrated and the body of the worker is stiffened in a limited posture, thereby damaging health.

DISCLOSURE Technical Problem

Therefore, the present invention has been made in view of the above problems, and it is an object of the present invention to provide a core-moving health chair which induces a change in pressure at a portion of an area upon which a user's weight rests, while the user sits on the chair.

It is another object of the present invention to provide a core-moving health chair which divides a seat, i.e. one of areas upon which a user's weight rests while the user sits on the chair, into an outer sheet and an inner sheet.

It is another object of the present invention to provide a core-moving health chair which divides a back panel, i.e. one of areas upon which a user's weight rests while the user sits on the chair, into an outer sheet and an inner sheet.

It is another object of the present invention to provide a core-moving health chair which divides a foothold panel, i.e. one of areas upon which a user's weight rests while the user sits on the chair, into an outer sheet and an inner sheet.

It is another object of the present invention to provide a core-moving health chair which lowers or raises an inner sheet below or above an outer sheet.

It is another object of the present invention to provide a core-moving health chair with a core driver which moves an inner sheet outwards (or upwards) or inwards (or downwards).

It is another object of the present invention to provide a core-moving health chair which drives a core driver through a motor.

It is another object of the present invention to provide a core-moving health chair which continuously and repeatedly drives a core installed on a seat panel, a back panel, or a foothold panel to vibrate a user's body and changes pressure applied to a part of the user's body compressed under a user's weight, thereby providing exercise effect.

It is a further object of the present invention to include a sofa or a bed, against which a user leans, in a category of chairs.

Technical Solution

In accordance with an aspect of the present invention, the above and other objects can be accomplished by the provision of a core-moving health chair including an outer sheet being one divided portion of an area of the chair upon which user's weight rests and thus to which pressure is applied an inner sheet disposed at the inside of the outer sheet and being another divided portion of the area of the chair upon which the user's weight rests and thus to which the pressure is applied, an outer frame being a portion of a main frame to support the outer sheet, an inner frame separated from the outer frame to support the inner sheet, and assembled with a core-driving unit so as to be movable, and a driver attached to the outer frame and assembled with the inner frame by a coupling lug to move the inner sheet to the outside of the outer sheet through a first stroke and to move the inner sheet to the inside of the outer sheet through a second stroke.

Advantageous Effects

The core-moving health chair in accordance with the present invention induces a change in pressure at a portion of an area upon which user's weight rests while the user sits on the chair. The change in pressure means a higher or lower pressure than the normal pressure under the condition that a user sits on the chair. The core-moving set of the core-moving health chair is applied to at least one area of a seat area, a back area, and a foothold area of a chair. The core-moving health chair adjusts the height of the inner sheet to be higher or lower than that of the outer sheet, and the core driver is driven by driving force of a motor and thus drives the inner sheet when the user leans against the chair, thereby changing pressure of a part of a user's body contacting the chair and compressed under the user's weight and thus assisting blood circulation of the part of the user's body and promoting health. The core-moving health chair in accordance with the present invention may be applied to an office chair so as to be driven during office work, or may be applied to a resting chair so as to reduce fatigue during rest, thus promoting health.

DESCRIPTION OF DRAWINGS

The above and other objects, features and other advantages of the present invention will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a view illustrating the simplest configuration of a core-moving health chair in accordance with the present invention;

FIG. 2 is a view illustrating a chair on which one or more core-moving sets are installed;

FIG. 3 is a view illustrating a configuration of the core-moving set;

FIG. 4 is a view illustrating a configuration of a hand-operated type core-moving set;

FIG. 5 is a plan view illustrating division of an outer sheet and an inner sheet;

FIG. 6 is a plan view of a partially opened outer sheet;

FIG. 7 is a plan view of a driver including a crank and a crank rod;

FIG. 8 is a longitudinal-sectional view of the driver including the crank and the crank rod;

FIG. 9 is one longitudinal-sectional view of a driver including a crank and a cam connected to each other;

FIG. 10 is another longitudinal-sectional view of the driver including the crank and the cam connected to each other;

FIG. 11 is a longitudinal-sectional view of a driver including a rack gear and a worm screw;

FIG. 12 is a transversal-sectional view of the driver including the rack gear and the worm screw; and

FIG. 13 is a block diagram of a controller of the driver including the rack gear.

MODE FOR INVENTION

Hereinafter, a core-moving health chair in accordance with the present invention will be described with reference to the accompanying drawings. First, the same or similar elements are denoted by the same reference numerals even if they are depicted in different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

The present invention provides the core-moving health chair. In the present invention, chairs to which a core-moving operation is applied include a sofa and a bed in addition to a simple chair. A seat area of the chair, upon which a user's weight rests and thus to which pressure is applied, is divided into an outer sheet region and an inner sheet region and the inner sheet region, i.e. a portion of the area, upon which the user's weight rests, is defined as a core and becomes independent of the outer sheet region, thereby forming an outer sheet and an inner sheet (the core) physically separated from each other. The present invention provides the core-moving health chair in which the core is mechanically driven by a core driver in order to change pressure of the inner sheet, i.e. the portion of the seat area, upon which the user's weight rests, while the user sits on the chair.

A first stroke of the core driver is an operation of moving the inner sheet located at the inside of the outer sheet to the outside of the outer sheet (i.e. above the outer sheet), and a second stroke of the core driver is an operation of moving the inner sheet located at the outside of the outer sheet to the inside of the outer sheet (i.e. below the outer sheet).

The core-moving health chair in accordance with the present invention includes an outer sheet 100 which is a portion of an area upon which user's weight rests and thus to which pressure is applied, an inner sheet 200, disposed at the inside of the outer sheet 100, which is another portion of the area upon which the user's weight rests and thus to which the pressure is applied, an outer frame 110 being a portion of a main frame 107 to support the outer sheet 100, an inner frame 210 separated from the outer frame 110 to support the inner sheet 200 and assembled with a core-driving unit, and a driver attached to the outer frame 110 and provided with a coupling lug 315 assembled with the inner frame 210 to achieve the first stroke defined as the operation of moving the inner sheet 200 to the outside of the outer sheet 100 or to achieve the second stroke defined as the operation of moving the inner sheet 200 to the inside of the outer sheet 100.

With reference to FIG. 1, a core driver 211 including a crank mechanism drives the inner sheet 200 along the first stroke and the second stroke. A driving motor of the driver 211 is a speed reduction motor 212. When a crank 214 at one end of a driving shaft 213 is driven along an orbit of revolution of an orbital diameter 216 of a crank pin 215, a crank rod 217 is assembled with a coupling lug 218, a slider 219 supported by a guide 219 a is driven along the first stroke and the second stroke within the distance of the orbital diameter 216, and operation of the slider 219 drives the inner sheet 200 along the first stroke and the second stroke.

The core-moving health chair of FIG. 1 driving the core as a portion of the seat area, to which pressure is applied in a sitting state, along the first stroke and the second stroke repeatedly induces a change in pressure at a part of a user's body compressed under the user's weight, thereby reducing fatigue due to use of the chair for a long time and preventing diseases from occurring due to use of the chair for a long time.

In the core-moving health chair, as shown in FIG. 2, three areas upon which user's weight rests and thus to which pressure is applied are set to a seat panel 104, a back panel 105, and a foothold panel 106. On each of the seat panel 104, the back panel 105, and the foothold panel 106, the outer sheet 100 and the inner sheet 200 divided from each other and physically independent of each other are installed, and a driver 300 is connected to the inner sheet 200 so as to drive the inner sheet 200 along the first stroke and the second stroke. In FIG. 2, as an additional device of the chair, a back posture adjusting device 105 a is provided on the back panel 105 so as to assemble a back frame to the main frame of the chair to adjust a slope of the back panel 105. Further, in FIG. 2, a foothold posture adjusting device 106 a is provided on the foothold panel 106 so as to assemble a support 106 b of the foothold panel 106 with the main frame of the chair to adjust a posture of the foothold panel 106.

The core-moving health chair of FIG. 2 respectively driving the cores installed at portions of the three areas, to which pressure is applied in the used state of the chair, along the first stroke and the second stroke repeatedly induces changes in pressure at three parts of a user's body compressed under the user's weight, thereby reducing fatigue due to use of the chair for a long time and preventing diseases from occurring due to use of the chair for a long time.

FIG. 3 illustrates a detailed configuration of a core-moving device. Reference numeral 180 is any one area of a seat area, a back area, and a foothold area of the chair, upon which a user's weight rests when a user sits on the chair and thus to which pressure is applied.

Here the area 180 is divided into a ring-shaped outer sheet region 181 and an inner sheet region 182, and the inner sheet region 182, i.e. a portion of the area, upon which the user's weight rests, is defined as a core which becomes independent of the outer sheet region 181, thereby forming the outer sheet 100 and the inner sheet 200 physically separated from each other. The inner sheet 200 is substantially received within an inner space part 110 b of the outer sheet 100, and is protected by a diaphragm 110 a or a structure performing a role corresponding to the diaphragm 110 a. The driver 300 is attached to the outer frame 110. The inner frame 210 and the driver 300 is connected by assembling a coupling lug 210 a and a coupling lug 315 with each other, and thus the driver 300 drives the inner frame 210 along the first stroke and the second stroke of the driver 300. Here, the coupling lug 210 a and the coupling lug 315 are assembled with each other through various methods, such as using a nut and a bolt, using a band, by welding, and through other methods.

In order to change pressure of the inner sheet 200 which is a portion of the area 180 upon which the user's weight rests, the inner sheet 200, i.e. the core is driven by the driver 300. The first stroke of the core driver 300 moves the inner sheet 200 at the inside of the outer sheet 100 to the outside of the outer sheet 100 and thus increases the pressure of the core above that of the outer sheet 100, and the second stroke of the core driver 300 moves the inner sheet 200 at the outside of the outer sheet 100 to the inside of the outer sheet 100 and thus decreases the pressure of the core below that of the outer sheet 100. A moving distance of the core necessary for the change in pressure during the first stroke and the second stroke is a distance 316 of a diameter of an orbit of revolution of a crank pin of the driver 300.

FIG. 4 illustrates a simple hand-operated type core-moving device. In FIG. 4, a distance of the first stroke and the second stroke is not set to a designated distance. The inner sheet 200 is physically separated from the outer sheet 100. The outer sheet 100 is attached to the outer frame 110. The inner sheet 200 is rotatably attached to the inner frame 210 within the inner space part of the outer sheet 100. As a driving unit of the inner sheet 200, a lifting nut 150 is installed on the outer frame 110, and a lifting screw 250 is installed on the inner frame 210. The lifting screw 250 is connected with the lifting nut 150. When the inner sheet 200 within the outer sheet 100 is rotated in one direction by operation of the driving unit of the inner sheet 200, the lifting screw 250 is rotated on the lifting nut 150, and then the inner sheet 200 placed at the inside of the outer sheet 100 moves to the outside of the outer sheet 100. When the inner sheet 200 is rotated in the opposite direction, the inner sheet 200 moves to the inside of the outer sheet 100. Such a core-moving operation of the chair adjusts the location of the inner sheet 200 relative to the outer sheet 100, thereby enabling pressure distribution of a portion of the seat of the chair, which the user's body contacts or to which pressure is applied, to be adjusted in compliance with the user's intension.

The hand-operated type core-moving device, as shown in FIG. 4, may be replaced with various devices known in machinery and instrument fields.

FIG. 5 illustrates one example of division of an area into an outer sheet and an inner sheet in the core-moving device. The area 180 upon which a user's weight rests under the condition that user sits on the chair and thus to which pressure is applied constitutes a portion of the outer sheet 100, as shown in a circle expressed by a dotted line. In other words, the area 180 upon which the user's weight rests and thus to which pressure is applied is included in the outer sheet 100. The outer sheet 100 is formed in a ring shape. The inner sheet 200 is physically separated from the outer sheet 100.

FIG. 6 illustrates another example of division of an area into an outer sheet and an inner sheet in the core-moving device. The outer sheet 100, including an area upon which a user's weight rests under the condition that user sits on the chair and thus to which pressure is applied, is provided with a forward opening part 100 a opened forwardly, and the inner sheet 200 is fitted into the outer sheet 100. The outer sheet 100 provided with the forward opening part 100 a serves to protect a part of an organ of the user's body from pressure when the user sits on the chair.

FIGS. 7 and 8 illustrate a detailed configuration of a driver having the first stroke and the second stroke in accordance with the present invention.

Here, the driver 300 is a driver including a crank. The driver 300 includes a housing 310 attached to the outer frame 110 by a flange 311, a slider 312 supported by the housing 310 so as to be vertically movable, a slider rail 313 allowing the slider 312 to be supported by the housing 310 such that the slider 312 is vertically movable, a housing inner space part 314 to receive the rail 313 and the slider 312, a coupling lug 315 to assemble the slider 312 with the inner frame 210, a reduction geared motor 320 attached to the housing 310 such that a driving shaft 323 is placed in the housing inner space part 314, a crank 324 provided on the driving shaft 323 of the geared motor 320, and a crank rod 327 to connect the crank 324 and a lug 312 a of the slider 312 with pins 325 and 326.

In the driver 300 including the crank 324, when driving current is supplied to the geared motor 320, the driving shaft 323 rotates the crank 324. A circular movement of the crank pin 326 along an orbit of revolution according to the rotation of the crank 324 drives the pin 325 at the outer end of the crank rod 327. The slider 312 is subject to the slider rail 313 and thus has properties of a rectilinear movement, and is assembled with the crank rod 317 with the lug 312 a and the pin 325 and thus is linked with the movement of the crank 324. Such a slider 312 driven by the crank 324 is operated to perform the first stroke when the slider 312 moves to the outside of the housing 310, and is operated to perform the second stroke when the slider 312 moves to the inside of the housing 310.

FIGS. 9 and 10 illustrate a detailed configuration of another driver having the first stroke and the second stroke in accordance with the present invention.

Here, the driver 301 is a driver including a cam. The driver 301 includes a housing 310 attached to the outer frame 110 by a flange 311, a slider 312 supported by the housing 310 so as to be vertically movable, a slider rail 313 allowing the slider 312 to be supported by the housing 310 such that the slider 312 is vertically movable, a housing inner space part 314 to receive the slider rail 313 and the slider 312, a coupling lug 315 to assemble the slider 312 with the inner frame 210, a reduction geared motor 320 attached to the housing 310 such that a driving shaft 323 is placed in the housing inner space part 314, a crank 324 provided on the driving shaft 323 of the geared motor 320, a cam hole 330 formed through the slider 312 and elongated perpendicularly to the moving direction of the slider 312, and a cam pin 331 installed on the crank 324 to revolve on the driving shaft 323 and fitted into the cam hole 330 to move the slider 312 vertically along the rail 313.

In the driver 301 including the cam, when driving current is supplied to the geared motor 320, the driving shaft 323 rotates the cam pin 331 within the cam hole 330. The slider 312 is subject to the slider rail 313 and thus has properties of a rectilinear movement. Therefore, the slider 312 is operated to perform the first stroke when the slider 312 moves to the outside of the housing 310, and is operated to perform the second stroke when the slider 312 moves to the inside of the housing 310.

The drivers 300 and 301 are suitable for an operation in which the first stroke and the second stroke are repeated. In the drivers 300 and 301, a repetition period of the first stroke and the second stroke is set to no more than 600 times per minute. Preferably, the repetition period is set to 1 to 240 times per minute. In case of an office chair, the repetition period is preferably set to 1 time per minute. In case of a resting chair, the repetition period is preferably set to 40 times per minute. If temporary massage is necessary, the repetition period may be selected from within the range of 40 to 600 times per minute. As the motor 320, a geared motor enabling speed control according to the purpose of the chair is preferably used.

In order to control a position of the driving shaft 323 through a program when the driver 300 or 301 is driven, a position detection unit 350 is installed on the driving shaft 323 of the motor 320. If the position detection unit 350 is installed on the driving shaft 323, the position detection unit 350 controls driving of the motor 320 through the program, and thus stops the operation of the motor 320 at the end of the first stroke and the end of the second stroke, thereby being capable of fixing the inner sheet 200. Further, the inner sheet 200 may be fixed to a designated position of the first stroke and a designated position the second stroke according to an installation position of the position detection unit 350.

When the position detection unit 350 detects an arrangement state of the crank 324 and the crank rod 327 on a straight line and stops the driving of the motor 320 at this position, the inner sheet 200 is fixed.

FIGS. 8 and 9 respectively illustrate examples of installation of the position detection unit 350 on the driving shaft 323 using microswitches.

The position detection unit 350 includes a moving pin 351 attached to the driving shaft 323 and contacting microswitches to change states of the switches, and two microswitches 352 and 353 disposed around the driving shaft 323 of the motor 320 at a straight angle so as to contact the moving pin 351 to perform a switching operation. If one microswitch 352 is installed such that the moving pin 351 operates the microswitch 352 at the uppermost position of the crank 324 and the other microswitch 353 is installed such that the moving pin 351 operates the microswitch 353 at the lowermost position of the crank 324, a micom controller provides a signal representing an end point of the first stroke and a signal representing an end point of the second stroke as signals of the switches 352 and 353. If the microswitches 352 and 353 are installed at changed positions, the controller provides a position of a regular middle point of the first stroke and the second stroke.

The position detection unit 350 may use optical couplers and magnetic sensors in addition to the microswitches 352 and 353.

FIGS. 11 and 12 illustrate a further driver. Here, the driver 400 drives the inner sheet 200 along the first stroke and the second stroke, and includes a rack gear. The driver 400 includes a lifting supporter 410 attached to the outer frame 110, a core lifting shaft 411 supported by the lifting supporter 410 so as to be vertically movable, a rack gear 430 installed on the lifting shaft 411 in the moving direction of the lifting shaft 411, a worm screw 440 to vertically move the rack gear 430 according to a rotating direction thereof, a driving shaft 423 connecting the worm screw 440 to a motor 420, the motor 420 driving the worm screw 440 in a first direction or a second direction through the driving shaft 423, a moving pin 451 attached to the rack gear 430 to indicate a raised position or a lowered position of the rack gear 430, and microswitches 452 and 453 installed at the upper end point of the first stroke and the lower end point of the second stroke to program a moving position of the rack gear 430.

In the driver 400, when first-directional driving current is supplied to the motor 420, the driving shaft 423 rotates the worm screw 440, the position of which is fixed, in the first direction. The rotation of the worm screw 440 in the first direction raises the rack gear 430 together with the lifting shaft 411 slidably assembled with the lifting supporter 410. The raising of the rack gear 430 moves the moving pin 451, and thus the moving pin 451 contacts the upper microswitch 452 and the upper microswitch 452 is operated.

The controller detects a signal of the upper microswitch 452, and stops driving of the motor 420. When second-directional driving current is supplied to the motor 420, the driving shaft 423 rotates the worm screw 440 in the second direction. The rotation of the worm screw 440 in the second direction lowers the rack gear 430 together with the lifting shaft 411 slidably assembled with the lifting supporter 410. The lowering of the rack gear 430 moves the moving pin 451, and thus the moving pin 451 contacts the lower microswitch 453 and the lower microswitch 453 is operated. The controller detects a signal of the lower microswitch 453, and stops driving of the motor 420. As described above, the raising of the rack gear 430 drives the inner sheet 200 together with the inner frame 210 attached to the lifting shaft 411 along the first stroke, and the lowering of the rack gear 430 drives the inner sheet 200 together with the inner frame 210 attached to the lifting shaft 411 along the second stroke. In the driver 400, since the rotation of the worm screw 440 moves the rack gear 430 but the rack gear 430 does not move the worm screw 440, when the driving of the motor 420 is stopped, the inner sheet 200 is fixed at the position where the driving of the motor 420 is stopped.

In the driver 400 of FIG. 11, the lifting supporter 410 may be manufactured separately from the outer frame 110, and then assembled with the outer frame 110. Further, in the driver 400 of FIG. 11, the lifting supporter 410 may be manufactured separately from the inner frame 210, and then assembled with the inner frame 210.

By omitting the position detection unit and driving the worm screw through a handle in the driver 400 of FIG. 11, the driver 400 may be used as a hand-operated inner sheet driver.

FIG. 13 illustrates a configuration of a drive controller. The driver 400 including the rack gear 430 drives the inner sheet 100, i.e. the core along the first stroke and the second stroke under the control of the drive controller of FIG. 13.

The driver 300 or 301 including the crank 324 may achieve the first stroke and the second stroke repeatedly when driving current is supplied to the motor, even if the controller of FIG. 13 is not used. However, in order to control the operation of the driver 300 or 301 without the rack gear 430 through a program, control of the micom drive controller has to be used.

A controller 500 of a driver driving the inner sheet 200 along the first stroke and the second stroke includes a driving switch 512 on a control panel 511 connected to a micom (microcomputer) 510, programmed for control, to transmit a drive start signal to the micom 510, a display lamp 513 on the control panel 511 connected to the micom 510 to display a power state, a display unit 515 connected to the micom 510 to allow the micom 510 to display operating state data, and a motor driver 520 to supply driving current from a power supply unit 530 to the motor 420 according to a control signal, a microswitch 452 installed on the frame so as to be opened and closed through contact with the moving pin 451 and to provide a positional signal of the upper end of the first stroke to the micom 510, and a microswitch 453 installed on the frame so as to be opened and closed through contact with the moving pin 451 and then provide a positional signal of the lower end of the second stroke to the micom 510.

Hereinafter, circulation control through the controller 510 will be described.

Step 0000: When power is supplied to the micom 510, the micom 510 initializes a control program. The micom 510 switches on the display lamp 510 of the control panel 510. The micom 510 allows the display unit 515 to display that the driver is now driven. The micom 510 monitors the state of the driving switch 512 of the control panel 511, and, when the micom 510 obtains a switch-on signal of the driving switch 512, performs Step 0001.

Step 0001: The micom 510 controls the motor driver 520 such that current to drive the motor 420 in the first direction is supplied to the motor 420, and monitors the upper microswitch 452, and when the micom 510 obtains a switch-on signal of the upper microswitch 452, performs Step 0002. Further, the micom 510 monitors the driving switch 512 of the control panel 511, and, when the micom 510 obtains the switch-on signal of the driving switch 512, performs Step 0005.

Step 0002: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 performs Step 0003.

Step 0003: The micom 510 controls the motor driver 520 such that current to drive the motor 420 in the second direction is supplied to the motor 420, and monitors the upper microswitch 452, and when the micom 510 obtains the switch-on signal of the upper microswitch 452, performs Step 0004. Further, the micom 510 monitors the driving switch 512 of the control panel 511, and, when the micom 510 obtains the switch-on signal of the driving switch 512, performs Step 0006.

Step 0004: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0001.

Step 0005: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0001.

Step 0006: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0003.

Hereinafter, various examples of application of the core-moving set of the core-moving health chair in accordance with the present invention will be described.

EXAMPLE 1

Application of core-moving set to office chair

The core-moving set was installed on a seat area of an office chair.

In the core-moving set:

1) An area of the core, i.e. the inner sheet is about 50% of an area of the outer sheet to which pressure is applied;

2) The inner sheet was installed in a space part protected by a rib within the outer frame connected to the main frame;

3) The inner sheet was supported by the inner frame within the space part;

4) The driver was attached to the outer frame;

5) The inner frame was connected to the driver by the coupling lug;

6) A distance of the first stroke and the second stroke of the inner sheet was 3 cm;

7) The driver was driven 1 time per minute.

As a result of use of the office chair provided with the core-moving set, a portion of the chair, to which a large amount of pressure is applied when a user sits on the chair, repeatedly moved between the inner sheet and the outer sheet.

The user experienced reduced fatigue.

EXAMPLE 2

Application of core-moving set to sofa

The core moving set of Example 1 was installed on a seat area and a back area of a sofa, respectively.

EXAMPLE 3

Installation of three core-moving sets

The core moving set of Example 1 was installed on three areas of a resting chair below with a foothold:

1) A seat area of the chair

2) A back area of the chair

3) The foothold area of the chair

EXAMPLE 4

The crank-type driver 300 including components below was manufactured:

1) The housing 310 attached to the outer frame 110 by the flange 311;

2) The slider 312 supported by the housing 310 so as to be vertically movable;

3) The slider rail 313 allowing the slider 312 to be supported by the housing 310 such that the slider 312 is vertically movable;

4) The coupling lug 315 to assemble the slider 312 with the inner frame 210;

5) The reduction geared motor 320 attached to the housing 310 such that the driving shaft 323 is placed in the housing inner space part 314;

6) The crank 324 provided on the driving shaft 323 of the geared motor 320;

7) The crank rod 327; and

8) The pins 325 and 326 to connect the crank 324 and the lug 312 a of the slider 312.

EXAMPLE 5

The crank and cam combination-type driver 301 including components below was manufactured:

1) The housing 310 attached to the outer frame 110 by the flange 311;

2) The slider 312 supported by the housing 310 so as to be vertically movable;

3) The slider rail 313 allowing the slider 312 to be supported by the housing 310 such that the slider 312 is vertically movable;

4) The coupling lug 315 to assemble the slider 312 with the inner frame 210;

5) The reduction geared motor 320 attached to the housing 310 such that the driving shaft 323 is placed in the housing inner space part 314;

6) The crank 324 provided on the driving shaft 323 of the geared motor 320;

7) The cam hole 330 formed through the slider 312; and

8) The cam pin 331 installed on the crank 324 and fitted into the cam hole 330.

EXAMPLE 6

The position detection unit 350 including components below, provided on the driving shaft 323, was further installed on the driver of Example 4:

1) The moving pin 351 attached to the driving shaft 323;

2) The microswitch 352 contacting the moving pin 351 to perform a switching operation; and

3) The microswitch 353 contacting the moving pin 351 to perform a switching operation.

The position detection unit 350 to detect an arrangement state of the crank 324 and the crank rod 327 on a straight line was used as a fixing unit of the inner sheet 200.

EXAMPLE 7

The position detection unit 350 including components below, provided on the driving shaft 323, was further installed on the driver of Example 5:

1) The moving pin 351 attached to the driving shaft 323;

2) The microswitch 352 contacting the moving pin 351 to perform a switching operation; and

3) The microswitch 353 contacting the moving pin 351 to perform a switching operation.

The position detection unit 350 to detect an arrangement state of the crank 324 and the crank rod 327 on a straight line was used as a fixing unit of the inner sheet 200.

EXAMPLE 8

A repetition period of the first stroke and the second stroke in the chair of Example 1 was 30 times per minute.

EXAMPLE 9

The rack gear-type driver 400 including components below was manufactured:

1) The lifting supporter 410 attached to the outer frame 110;

2) The core lifting shaft 411 supported by the lifting supporter 410 so as to be vertically movable;

3) The rack gear 430 installed on the lifting shaft 411 in the moving direction of the lifting shaft 411;

4) The worm screw 440 to vertically move the rack gear 430 according to a rotating direction thereof;

5) The driving shaft 423 connecting the worm screw 440 to the motor 420;

6) The motor 420 to drive the worm screw 440 in the first direction or the second direction through the driving shaft 423;

7) The moving pin 451 attached to the rack gear;

8) The upper end point microswitch 452 operated through contact with the moving pin 451; and

9) The lower end point microswitch 453 operated through contact with the moving pin 451.

EXAMPLE 10

The assembly of the rack gear and the worm screw in Example 9 was used as a fixing unit of the inner sheet 200.

EXAMPLE 11

The controller 500 of the driver 400 of Example 9 including components below was manufactured:

1) The control panel 511 and the driving switch 512;

2) The motor driver 520;

3) The microswitch 452 installed at the upper end point of the first stroke to provide positional data to the micom 510;

4) The microswitch 453 installed at the lower end point of the second stroke to provide positional data to the micom 510; and

5) The micom 510 for control.

EXAMPLE 12

The micom 510 of the controller 500 of Example 11 was programmed so as to perform processing steps below:

Step 0000: After the micom 510 initializes a control program, when the micom 510 obtains the switch-on signal of the driving switch 512, the micom performs Step 0001;

Step 0001: The micom 510 controls the motor driver 520 such that current to drive the motor 420 in the first direction is supplied to the motor 420, and monitors the upper microswitch 452, and when the micom 510 obtains a switch-on signal of the upper microswitch 452, performs Step 0002. Further, the micom 510 monitors the driving switch 512 of the control panel 511, and, when the micom 510 obtains the switch-on signal of the driving switch 512, performs Step 0005;

Step 0002: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 performs Step 0003;

Step 0003: The micom 510 controls the motor driver 520 such that current to drive the motor 420 in the second direction is supplied to the motor 420, and monitors the upper microswitch 452, and when the micom 510 obtains the switch-on signal of the upper microswitch 452, performs Step 0004. Further, the micom 510 monitors the driving switch 512 of the control panel 511, and, when the micom 510 obtains the switch-on signal of the driving switch 512, performs Step 0006;

Step 0004: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0001;

Step 0005: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0001; and

Step 0006: The micom 510 controls the motor driver 520 such that supply of the current to drive the motor 420 is stopped, and monitors the driving switch 512 of the control panel 511. When the micom 510 obtains the switch-on signal of the driving switch 512, the micom 510 is fed back to Step 0003.

EXAMPLE 13

The hand-operated inner sheet driving unit including components below was manufactured:

1) The lifting nut installed on the outer frame; and

2) The lifting screw installed on the inner frame and assembled with the lifting nut.

EXAMPLE 14

The hand-operated inner sheet driver, in which the worm screw is moved by hand, including components below was manufactured:

1) The lifting supporter 410 attached to the outer frame 110;

2) The core lifting shaft 411 supported by the lifting supporter 410 so as to be vertically movable;

3) The rack gear 430 installed on the lifting shaft 411 in the moving direction of the lifting shaft 411;

4) The worm screw 440 to vertically move the rack gear 430 according to a rotating direction thereof; and

5) The handle connected to the worm screw 440 so as to be rotated by hand to operate the worm screw 440.

INDUSTRIAL APPLICABILITY

The core-moving health chair in accordance with the present invention induces a change in pressure at a portion of an area upon which user's weight rests while the user sits on the chair. The change in pressure means a higher or lower pressure than the normal pressure under the condition that a user sits on the chair. The core-moving set of the core-moving health chair is applied to at least one area of a seat area, a back area, and a foothold area of a chair. The core-moving health chair adjusts the height of the inner sheet to be higher or lower than that of the outer sheet, and the core driver is driven by driving force of a motor and thus drives the inner sheet when the user leans against the chair, thereby changing pressure of a part of a user's body contacting the chair and compressed under the user's weight and thus assisting blood circulation of the part of the user's body and promoting health.

The core-moving health chair in accordance with the present invention may be applied to an office chair so as to be driven during office work, or may be applied to a resting chair so as to reduce fatigue during rest, thus promoting health.

Although the preferred embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. 

1. A core-moving health chair comprising: an outer sheet being one divided portion of an area of the chair upon which user's weight rests and thus to which pressure is applied; an inner sheet disposed at the inside of the outer sheet and being another divided portion of the area of the chair upon which the user's weight rests and thus to which the pressure is applied; an outer frame being a portion of a main frame to support the outer sheet; an inner frame separated from the outer frame to support the inner sheet, and assembled with a core-driving unit so as to be movable; and a driver attached to the outer frame and assembled with the inner frame by a coupling lug to move the inner sheet to the outside of the outer sheet through a first stroke and to move the inner sheet to the inside of the outer sheet through a second stroke.
 2. The core-moving health chair according to claim 1, wherein the chair having the area divided into the outer sheet and the inner sheet includes a sofa or a bed.
 3. The core-moving health chair according to claim 1, wherein the area of the chair upon which the user's weight rests and thus to which pressure is applied includes at least one of a seat area, a back area, and a foothold area of the chair.
 4. The core-moving health chair according to claim 1, wherein the driver to move the inner sheet to the outside of the outer sheet and to move the inner sheet to the inside of the outer sheet includes: a housing attached to the outer frame by a flange; a slider supported by the housing so as to be vertically movable; a slider rail allowing the slider to be supported by the housing such that the slider is vertically movable; a housing inner space part to receive the rail and the slider; a coupling lug to assemble the slider with the inner frame; a reduction geared motor attached to the housing such that a driving shaft is placed in the housing inner space part; a crank provided on the driving shaft of the geared motor; and a crank rod to connect the crank and a lug of the slider with pins.
 5. The core-moving health chair according to claim 1, wherein the driver to move the inner sheet to the outside of the outer sheet and to move the inner sheet to the inside of the outer sheet includes: a housing attached to the outer frame by a flange; a slider supported by the housing so as to be vertically movable; a slider rail allowing the slider to be supported by the housing such that the slider is vertically movable; a housing inner space part to receive the slider rail and the slider; a coupling lug to assemble the slider with the inner frame; a reduction geared motor attached to the housing such that a driving shaft is placed in the housing inner space part; a crank provided on the driving shaft of the geared motor; a cam hole formed through the slider and elongated perpendicularly to the moving direction of the slider; and a cam pin installed on the crank to revolve on the driving shaft and fitted into the cam hole to move the slider vertically along the rail.
 6. The core-moving health chair according to claim 4, wherein a position detection unit is installed on the driving shaft of the geared motor to program positional states of ends of the crank.
 7. The core-moving health chair according to claim 6, wherein the position detection unit includes a moving pin attached to the driving shaft, and two microswitches disposed around the driving shaft of the motor at a straight angle so as to contact the moving pin to perform a switching operation.
 8. The core-moving health chair according to claim 4, wherein the driver generating the first stroke and the second stroke, along which the inner sheet moves, continuously rotates the motor to repeat the first stroke and the second stroke, and a repetition period of the first stroke and the second stroke is no more than 600 times per minute.
 9. The core-moving health chair according to claim 1, wherein the driver to generate the first stroke and the second stroke, along which the inner sheet moves, includes: a lifting supporter attached to the outer frame; a core lifting shaft supported by the lifting supporter so as to be vertically movable; a rack gear installed on the lifting shaft in the moving direction of the lifting shaft; a worm screw to vertically move the rack gear according to a rotating direction thereof; a driving shaft connecting the worm screw to a motor; the motor to drive the worm screw in a first direction or a second direction through the driving shaft; and microswitches installed at upper and lower end points of a moving pin, attached to the rack gear to indicate a raised position or a lowered position of the rack gear, to program a moving position of the rack gear.
 10. The core-moving health chair according to claim 9, wherein the driver driving the inner sheet through the first stroke and the second stroke includes an inner sheet fixing unit, and the inner sheet fixing unit is an assembly of the rack gear and the worm screw.
 11. The core-moving health chair according to claim 9, wherein a controller of the driver driving the inner sheet through the first stroke and the second stroke includes: a driving switch on a control panel to transmit a drive start signal to a micom programmed for control; a motor driver to supply current to the motor of the driver so as to drive the inner sheet through the first stroke according to a driving control signal; an upper end point microswitch installed at the upper end point of the moving pin along the first stroke to provide positional data to the micom; and a lower end point microswitch installed at the lower end point of the moving pin along the second stroke to provide position data to the micom.
 12. The core-moving health chair according to claim 11, wherein the micom of the controller is programmed to perform: Step 0000 of initializing a control program when power is supplied to the micom, and performing Step 0001 when the micom obtains a switch-on signal of the driving switch; Step 0001 of controlling the motor driver such that current to drive the motor in the first direction is supplied to the motor, monitoring the upper microswitch and then performing Step 0002 when the micom obtains a switch-on signal of the upper microswitch, and monitoring the driving switch of the control panel and then performing Step 0005 when the micom obtains the switch-on signal of the driving switch; Step 0002 of controlling the motor driver such that supply of the current to drive the motor is stopped, and monitoring the driving switch of the control panel and then performing Step 003 when the micom obtains the switch-on signal of the driving switch; Step 0003 of controlling the motor driver such that current to drive the motor in the second direction is supplied to the motor, monitoring the upper microswitch and then performing Step 0004 when the micom obtains the switch-on signal of the upper microswitch, and monitoring the driving switch of the control panel and then performing Step 0006 when the micom obtains the switch-on signal of the driving switch; Step 0004 of controlling the motor driver such that supply of the current to drive the motor is stopped, and monitoring the driving switch of the control panel and then being fed back to Step 0001 when the micom obtains the switch-on signal of the driving switch; Step 0005 of controlling the motor driver such that supply of the current to drive the motor is stopped, and monitoring the driving switch of the control panel and then being fed back to Step 0001 when the micom obtains the switch-on signal of the driving switch; and Step 0006 of controlling the motor driver such that supply of the current to drive the motor is stopped, a nd monitoring the driving switch of the control panel and thus being fed back to Step 0003 when the micom obtains the switch-on signal of the driving switch.
 13. A core-moving health chair comprising: an outer sheet being one divided portion of an area of the chair upon which user's weight rests and thus to which pressure is applied; an inner sheet disposed at the inside of the outer sheet and being another divided portion of the area of the chair upon which the user's weight rests and thus to which the pressure is applied; an outer frame being a portion of a main frame to support the outer sheet; an inner frame separated from the outer frame to support the inner sheet, and assembled with a core-driving unit so as to be movable; and an inner sheet moving unit to move the inner sheet to the outside of the outer sheet by hand and to move the inner sheet to the inside of the outer sheet by hand.
 14. The core-moving health chair according to claim 13, wherein the inner sheet moving unit includes a lifting nut installed on the outer frame, and a lifting screw installed on the inner frame and assembled with the lifting nut.
 15. The core-moving health chair according to claim 5, wherein a position detection unit is installed on the driving shaft of the geared motor to program positional states of ends of the crank.
 16. The core-moving health chair according to claim 5, wherein the driver generating the first stroke and the second stroke, along which the inner sheet moves, continuously rotates the motor to repeat the first stroke and the second stroke, and a repetition period of the first stroke and the second stroke is no more than 600 times per minute. 